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Set BINARYEN_TRAP_MODE=clamp #55845

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Nov 11, 2018
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Set BINARYEN_TRAP_MODE=clamp #55845

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8 changes: 7 additions & 1 deletion src/librustc_target/spec/wasm32_unknown_emscripten.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -11,12 +11,18 @@
use super::{LinkArgs, LinkerFlavor, Target, TargetOptions};

pub fn target() -> Result<Target, String> {
// FIXME(nikic) BINARYEN_TRAP_MODE=clamp is needed to avoid trapping in our
// -Zsaturating-float-casts implementation. This can be dropped if/when
// we have native fpto[su]i.sat intrinsics, or the implementation otherwise
// stops relying on non-trapping fpto[su]i.
let mut post_link_args = LinkArgs::new();
post_link_args.insert(LinkerFlavor::Em,
vec!["-s".to_string(),
"BINARYEN=1".to_string(),
"-s".to_string(),
"ERROR_ON_UNDEFINED_SYMBOLS=1".to_string()]);
"ERROR_ON_UNDEFINED_SYMBOLS=1".to_string(),
"-s".to_string(),
"BINARYEN_TRAP_MODE='clamp'".to_string()]);

let opts = TargetOptions {
dynamic_linking: false,
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